Are budgies cannibals ?

[Catherine]

I am going to have to wait until tomorrow when I can talk to one of my bird expert friends. I am not as experienced with birds. 
I do know most animals will try and remove a dead member of their group because dead bodies attract predators.
Budgies do seem to live in groups. Having two males might be a problem. One might have been aggressive to the other.
Many kinds of animals can be aggressive when they feel threatened or over crowded. 

Was the other bird really dead? Did the aggressive bird kill him? Were they both males?

You would be surprized at how many species will eat the meat of a dead member of their species. I just think of it as a survival tactic. All that extra protein could really help. Even humans have been known to eat their dead in extreme circumstances.
The will to survive and thrive is very strong.